A new report describes how older adults who changed the balance of fat, carbohydrates, and animal protein in their diets showed signs of reduced biological age after only four weeks. The finding suggests that dietary macronutrient composition may influence measures of aging more quickly than previously assumed.
The strongest effect appeared among participants following an omnivorous, lower-fat, higher-carbohydrate diet. The report does not compare this approach with other dietary patterns in detail, but it identifies that specific combination as the one linked to the most pronounced reduction in biological age.
Because the report covers a single study, it does not provide independent confirmation or contrasting results. Still, the observed change in biological age over such a short period highlights diet as a potentially rapid lever for aging-related health markers.